Backpack [outdoor equipment] - Measurement method

When choosing a backpack, we may say that we want to measure the data and select the right backpack. Then everyone knows how to measure it. The following Xiaobian will take everyone to find out.
Back length:
The length of the long back measuring backpack is determined by the back length of the body and is not determined by the height. The method for measuring back length is to let others measure their backs with a soft ruler.
Starting from the position of the 7th vertebrae, it is the position where you can feel the bone protruding from the back of the neck. Here is the junction of the neck and shoulders. From this down to the position of the upper edge of the pelvis. The method of determining the position of the upper edge of the pelvis is to put your hand on the hips. You can touch the sacrum (commonly known as the big sacrum), and the sacrum is located symmetrically in front of the buttocks. With his hands pressed to his hips, his thumb is pressed against the lower back.
The so-called back length is the length between the seventh vertebra and the pelvis line.
Waist circumference:
Measure the circumference of the pelvis along the circumference of the girth. The backpack has a body weight of 4.5 kg to 6.8 kg. The top of the belt should be 2.5 cm above the pelvic line. Try to lift your legs so that the thighs are parallel to the ground. At this time, the bend of the leg should be as high as the bottom edge of the belt. If you raise your leg and the thigh lifts the belt up, then raise the backpack a little from your hips. The common mistake people make is usually putting the backpack too low.
Adjusting the chest strap Measure the circumference of the pelvis along the circumference of the waist. Measuring the circumference of the pelvis The circumference of the waist circumference The chest strap on the waist strap can move upwards or downwards. Can be moved to a comfortable position without affecting breathing.
Shoulder straps and piggyback lifters should be fixed and the strap carrying the lifter pulled tight and placed at a 45-degree angle from the horizontal.
The above is how to choose a backpack to measure.